16ea9a8841b481476dea7c8471653b58cd2969c529b0a9aa1fd4dc0b987c34eb

Analysis

max time kernel
45s
max time network
50s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
01/12/2022, 05:54

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General

Target

16ea9a8841b481476dea7c8471653b58cd2969c529b0a9aa1fd4dc0b987c34eb.dll
Size

231KB
MD5

5c99f42e80422ce649f52c623ab045d2
SHA1

d6c1761de7f2a59acf73d004227101511ee4af43
SHA256

16ea9a8841b481476dea7c8471653b58cd2969c529b0a9aa1fd4dc0b987c34eb
SHA512

1461dd32d4c0f5fdc89d27b69ca39693c0f0b3d8a6eb72f7748f811357ac218b6dbd8b7b3b0d82d0e513a26c2ca0dd60e873efc41ac4e1baed7c05b0d6395cd7
SSDEEP

3072:zysX0WxnWd/IkmL+PViEbmzwtz/wk8YWbG:mskd/IkmuVfyWdMG

Score

10^/10

persistence

Malware Config

Signatures

Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\zezwvxcjz = "{5e7ed1a5-d6f6-2b4b-e707-d6f6592d3d54}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
1516	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\mrmjikpwm.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\mrmjikpwm.dll	rundll32.exe
File created	C:\Windows\SysWOW64\uzurqsxeu.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\uzurqsxeu.dll	rundll32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{5e7ed1a5-d6f6-2b4b-e707-d6f6592d3d54}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{5e7ed1a5-d6f6-2b4b-e707-d6f6592d3d54}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{5e7ed1a5-d6f6-2b4b-e707-d6f6592d3d54}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{5e7ed1a5-d6f6-2b4b-e707-d6f6592d3d54}\InprocServer32\ = "C:\\Windows\\SysWow64\\uzurqsxeu.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{5e7ed1a5-d6f6-2b4b-e707-d6f6592d3d54}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1516	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1516	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1516	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1464 wrote to memory of 1516	1464	rundll32.exe	26
PID 1464 wrote to memory of 1516	1464	rundll32.exe	26
PID 1464 wrote to memory of 1516	1464	rundll32.exe	26
PID 1464 wrote to memory of 1516	1464	rundll32.exe	26
PID 1464 wrote to memory of 1516	1464	rundll32.exe	26
PID 1464 wrote to memory of 1516	1464	rundll32.exe	26
PID 1464 wrote to memory of 1516	1464	rundll32.exe	26

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\16ea9a8841b481476dea7c8471653b58cd2969c529b0a9aa1fd4dc0b987c34eb.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1464
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\16ea9a8841b481476dea7c8471653b58cd2969c529b0a9aa1fd4dc0b987c34eb.dll,#1
  2⤵
  - Adds autorun key to be loaded by Explorer.exe on startup
  - Loads dropped DLL
  - Drops file in System32 directory
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:1516

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Windows\SysWOW64\mrmjikpwm.dll

Filesize
625KB

MD5
95e2376b3323f062eb562b8586d0f14a

SHA1
453d4c3bf4a489433b593420a37bbffb7749875a

SHA256
bd3fa8750123d00aa0967fba44372c46ea002681da9c9b77a4f9261553e26017

SHA512
b898603d07a49237e4dfc6872d5caa7616bae1258926f10e66c4d3f0d81cccefac1e844395b65bb1f308fbc022061b52e51f60658d0a546c04b365b3428cc87d

Download Submit
memory/1516-55-0x0000000075B51000-0x0000000075B53000-memory.dmp

Filesize
8KB

Download
memory/1516-56-0x0000000000150000-0x0000000000193000-memory.dmp

Filesize
268KB

Download
memory/1516-58-0x0000000000150000-0x0000000000193000-memory.dmp

Filesize
268KB

Download
memory/1516-59-0x0000000000150000-0x0000000000193000-memory.dmp

Filesize
268KB

Download